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Curable copolymers of episulfide monomers
申请号	US3624055D	申请日	1964-05-18	公开(公告)号	US3624055A	公开(公告)日	1971-11-30
申请人	THIOKOL CHEMICAL CORP;			发明人	GOBRAN RIAD H; OSBORN STEPHEN W;
摘要	Copolymers essentially composed of a major portion of monomeric units derived from one or more monomers which are free from ethylenic unsaturation, have at least three carbon atoms and have a polymerizable thiiranyl group; and a minor portion of monomeric units derived from one or more monomers having both a polymerizable thiiranyl group and a polymerizable ethylenically unsaturated group are disclosed. The monomers free from ethylenic unsaturation may be, for example, ethylene sulfide, propylene sulfide, the 1,2- and 2,3-butylene sulfides, vinyl cyclohexane sulfide, 2-benzyl thiirane, paramethyl styrene episulfide, styrene sulfide, cyclohexene episulfide, and isobutylene sulfide. The ethylenically unsaturated monomers may be, for example, allylthioglycidyl ether, thioglycidyl acrylates, thioglycidyl alkacrylates such as thioglycidyl methacrylate, vinyl cyclohexene episulfide, and butadiene monoepisulfide. The monomers are polymerized through the thiiranyl groups thereof. The copolymers can be cured through the ethylenically unsaturated groups thereof to produce elastomers having good physical properties and solvent resistance.
权利要求	2. A copolymer as in claim 1 comprising a major portion of monomeric units derived from butylene sulfide. 3. A copolymer as in claim 1 wherein said monomers having a polymerizable ethylenically unsaturated group are selected from the group consisting of allylthioglycidyl ether, vinyl cyclohexene episulfide and butadiene monoepisulfide. 4. A cured copolymer formed by curing the copolymer of claim 1 through the ethylenically-unsaturated groups thereof. 5. A polymer according to claim 1 containing a minor proportion of monomeric units derived from ethylene sulfide. 6. A vulcanizable elastomeric copolymer consisting essentially of units derived from a major portion of butylene sulfide and a minor portion of allylthioglycidyl ether, said ether being polymerized through the thioglycidyl group thereof. 7. A copolymer consisting essentially of a major portion of propylene sulfide units, a minor portion of ethylene sulfide units, and a minor portion of allylthioglycidyl ether units, said ether being polymerized essentially wholly through the thioglycidyl group thereof, said copolymer having pendant ethylenically unsaturated groups through which it can be cured. 8. A cured copolymer formed by curing the polymer of claim 7 essentially wholly through the ethylenically unsaturated groups thereof. 9. A copolymer consisting essentially of a major portion of butylene sulfide units, a minor portion of ethylene sulfide units, and a minor portion of allylthioglycidyl ether units, said ether being polymerized essentially wholly through the thioglycidyl group thereof, said copolymer having pendant ethylenically unsaturated groups through which it can be cured. 10. A cured copolymer formed by curing the polymer of claim 9 essentially wholly through the ethylenically unsaturated groups thereof. 11. A copolymer consisting essentially of a major portion of butylene sulfide units, a minor portion of cyclohexene sulfide units, and a minor portion of allylthioglycidyl ether units, said ether being polymerized essentially wholly through the thioglycidyl group thereof, said copolymer having pendant ethylenically unsaturated groups through which it can be cured. 12. A cured copolymer formed by curing the polymers of claim 11 essentially wholly through the ethylenically unsaturated groups thereof. 13. A vulcanized copolymer of butylene sulfide and allylthioglycidyl ether.
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